That appears to be a later model tractor than an H, SH, 300, 460 or 560 or anything of that age. Looks to be a 06, 56, 66, or maybe 88 series rear housing. Thinking about the view you sent and it appears your tractor is leaking out of the draft sensing assembly that the base of the three-point arms connect to. There is a torsion bar tube and a torsion spring in there. The torsion bar is sealed with O-rings in the differential housing that wear out and there are also bushings in there that wear out as well as well as the torsion tube itself.
A model number would be most helpful in identifying what we are looking at.
Anyhow, this is my guess.